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Timezone reference
Start with the most useful IANA zones, abbreviation references, and conversion pairs instead of guessing which timezone page to open first.
Last updated recently. Zone references, abbreviations, and conversion pairs refresh on the timezone data update window so the hub stays aligned with the current route catalog.
Browse by region
Each continent rail goes deeper than the popular grid above. Open a zone to see its UTC offset, abbreviation, daylight-saving rules, and the major cities that observe it.
Americas
Europe
Asia & Middle East
How IANA zones are named
Browse by offset
Grouped along the offset axis rather than by continent — useful when you are reasoning about overlap windows and which regions share working hours. Offsets shown are representative standard values; a zone's live offset can differ during daylight saving.
UTC-08:00 to UTC-05:00
North and South American business hours
UTC+00:00 to UTC+03:00
Western Europe, Africa, and the Middle East
UTC+05:00 to UTC+08:00
South, Southeast, and East Asia
UTC+09:00 to UTC+13:00
Japan, Korea, Australia, and the Pacific
By population served
A handful of zones serve a large share of the world's population — China runs on a single zone, and India's UTC+05:30 covers well over a billion people. These are the zones most timestamps and meetings touch.
Short labels
AEST
Open the abbreviation reference page.
CET
Open the abbreviation reference page.
EST
Open the abbreviation reference page.
GMT
Open the abbreviation reference page.
IST
Open the abbreviation reference page.
JST
Open the abbreviation reference page.
PST
Open the abbreviation reference page.
UTC
Open the abbreviation reference page.
Converter pairs
EST→PST
Open the practical conversion table and city context.
EST→CST
Open the practical conversion table and city context.
EST→MST
Open the practical conversion table and city context.
EST→GMT
Open the practical conversion table and city context.
EST→UTC
Open the practical conversion table and city context.
EST→IST
Open the practical conversion table and city context.
EST→CET
Open the practical conversion table and city context.
EST→CEST
Open the practical conversion table and city context.
EST→JST
Open the practical conversion table and city context.
EST→AEST
Open the practical conversion table and city context.
EST→AEDT
Open the practical conversion table and city context.
EST→BST
Open the practical conversion table and city context.
Timezone questions usually spill into city clocks, compare pages, or broader scheduling tools once the reference is clear.
Reference fields include IANA zone-ID structure, the Area/Location naming pattern, the distinction between zones and abbreviations, the tzdata release cycle, and the popular zones with their offsets and abbreviations.
